<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 100px;
            height: 300px;
            color: brown;
        }
    </style>
</head>
<body>
    <div class="box">
        放假啊
        <div class="box-bd">
            <div class="inner">
                hello
            </div>
        </div>
        <a href="">百度</a>
    </div>
</body>
</html>